Re. Sacco et al., INDUCTION OF INTERLEUKIN (IL)-1-BETA AND IL-8 MESSENGER-RNA EXPRESSION IN PORCINE MACROPHAGES BY LIPOPOLYSACCHARIDE FROM SERPULINA-HYODYSENTERIAE, Infection and immunity, 64(10), 1996, pp. 4369-4372
Lipopolysaccharide (LPS) is a classic inducer of inflammatory cytokine
s and is a key virulence factor for most gram-negative pathogens. The
effect of phenol-water (LPS) and butanol-water (endotoxin) extracts fr
om Serpulina hyodysenteriae on inflammatory cytokine mRNA expression f
rom porcine alveolar macrophages was investigated. The LPS and endotox
in extracts from S. hyodysenteriae induced a dose-dependent expression
of interleukin 1 beta (IL-1 beta) and IL-8 which was weak compared wi
th the responses induced by Escherichia coli LPS. In addition, the spi
rochetal extracts induced no detectable upregulation of mRNA expressio
n for either IL-6 or tumor necrosis factor alpha.